Machine tool



Oct. 21, 1952 A. R. cHAsAR 2,614,435

MACHINE TOOL Filed June 16. 1949 5 Sheets-Sheet 1 INVENTOR nihory R Chasar ATTORNEYS r 5. 2 a f7 140,. n wk W. .hun RM 4 1M W\\\\\ c M im m 9 S .I T z www im. s III .n./Q/ 1m )W .5 g .m MQ Y. Sv m m B R w w, u -I i l m M E Nk i hh. R m Nw mm A A .M Il mv l. mm Sv n -w lll n# Inwmh ,R lwmmm Hi: hm. n. mm N: G 4/ E Q S mm Oct 2l, 1952 Filved June 16, 1949 A. R. CHASAR Oct. 2l, 1952 MACHINE TOOL.

5 Sheets-Sheet 3 Filed June 16, 1949 AIF m.

INVENTOR mk R. fm KA .n

A. R. CHASAR MACHINE TOOL Oct. 21, 1952 `5 sheets-sheet 4 Filed June 16, 1949 :III

NVENTOR y ntkon-y R. Cha/,sar

BY wwf-L57 ATTORNEYS A. R. cHAsAR 2,614,435

Oct. 21, 1952 MACHINE TOOL.

ATTORNEY Patented Oct. 21, 1952 Ulsuisov STA."-

-2,6141,1i35 MACHINE 'rooL Anthonyv R. C hasar; Cleveland, Ohio, assigner to "The Oster Manufacturing Company, Cleveland, Ohio, a corporation of Ohio Application .time 16, 1949, serial No. 99,371

The invention has for its main object to provide a machine in vwhich the spindle and driving mechanism are compactly housed and in Which alllparts.;arereadily accessible and easily detachable 'forreplacement or repair.

More specifically the invention provides a ma'-` i chine in which the `spindle driving mechanism, comprising va motor and reduction gearing, .are detachably mounted on a hinged panel forming allor part of one sidewall of the spindle housing,v the panel-being movable from an upright 'closed position toahorzontal position Where.. the motor and gearing are clear of the spindle and conven-V iently accessible`,-the motorand reduction gear'- l ing being detachablyl mountedon the panel ,soy n that onedriving unit can bereadily replaced with another.

Y Itis also" object ofthe invention to providev a; machineV iiivvhich a lubricant pump is mounted on thehinged: panel and geared to the motor', and inwhichfthe .pump lis detachable from the panel independentlyof the motor.

. yItis also an obJectof the inventionto provide amachine in which the panel carrying the spindle driving mechanism is. adjustableA to vary the backlash between the gear .on the spindle anda driving gear on the panel unit. n fFui'ther. objectsfa're to providea vmachineo'f claims. (ci. vip-*405) scale, taken on the line indicated at 3-*3 Fig. `1 4 is a side elevation of the gauge shown in Fig; 3;

Fig. 5 is a central vertical longitudinal section taken through the spindle housing "on the line indicated at 5-5 in Fig. 7

l Fig. 6 is a fragmentary detail view showing the connection between 'the actuating. hand Wheel` and the scroll Wheel of the centering chuck;

Fig. '7 is a vertical transverse sectionon an enlarged scale through the machine taken on the line indicated at 'iin Fig. 2, a lportion of the housing being"`broken away to show the spindle drivingmechanism; f l

Fig. 8 is ya top plan View showing the mechanism sup-porting side panel of the housingin open position, the top oi the spindle housing being brolen away to expose Vpa'rtswithin the housing.'

Fig.'9 is a detail view on an enlarged scale showing the hinge connecting the side panel to the housing;

Fig. l0 is a fragmentary sectionr'taken on thek line indicated at Ill-i B in Fig. 9; Y y

Fig. 1.1 is a transverse vertical section through the yspindle housing, With the hinged panel fin horizontal position, taken on the linevindicated at II'-II in Fig. 8;

Fig. 12 is la fragmentary horizontal section showing the motor controlling switch; and

the character described invvhich theweighto'f the spindle andthe 'spindle supporting structure is.Y greatly reduced Without fsacrice of strength and'which can be manufactured fat low cost.

The invention also has Vfor'an object to provide v ent to onefskilled'inf'the artto; which the inventionpertains.` Y i s Reference should be hadto'the accompanying drawings forming-ia part of Ythe specification, in

' which: i

Figure lis a plan View oi va thread cutting machine embodying the invention; v..nv l K isalsideielevation o f the machine; n y y Fig .`3 is airagmentary section on an enlarged 'Fig 13 isl a vertical section taken on the line indicated at iS-fISinFig. 1 2.

Inthe accompanying drawings the invention is shown applied to ya Vthread cuttingI machine having an elongated bed or frame I" carriedby suitable supporting legs 2,.` The machine isfpreferablyportable and is provided with handles 3 and 4 at the front and rearr by means of which itmay be carried. Within the bed or frame I of the machine there Visy provided asump or reservoir 5 adapted to contain a supply of lubricant for cooling the Workandfthreading dies during thread'cutting operations. y

On the rear portion of theA bed lI there is mount.- ed a spindle housing S having front'andfrear Walls "I and 8, a xedside Vwall 9 anda .hinged panel I which forms all or a major portionfof the side Wall opposite the sidewall 9.1 IExtending 3 bf the chuck I3 a cutter and die head carriage I5 is slidably mounted on the bed I for movement toward and away from the chuck I3 in the direction of the axis of the spindle I I.

The carriage can be moved forwardly and rearwardly on the bed I by means of a manually operable lever I6 to position the carriage with respect to the work. The carriage I has a transversely movable slide I1 on the side thereof facing the chuck I3 which carries a reamer I8 and a threading die I9 both of conventional form',

the threading die being provided with the usual manually operable closing lever 20. On the front side thereof the carriage I5 has a cut-ofi` attach. ment 2I that is adjustable by means of an actuating screw 22, as is common practice in pipe threading machines.

At one side of the bed I a rod 23 is secured at its ends to brackets 24 attached to the bed and is disposed parallel to a line of movement of the carriage I5. The rod 25 provides a support for an indicating member 25 in the form of a polygonal screw vthat is slidably and rotatably mounted thereon. The indicating member is provided with corner threads 26 and has a series of flat longitudinal faces 21 that are provided with scales graduated to different thread pitches. The member 25 has a lmurled head 28 at one end by means of which it may be turned on the rod 23.

A resilient pointer 29 is attached at its inner end to the carriage I5 and'has an outer end portion closely overlying the member 25. The pointer 29 is engaged by corner portions of the polygonal member 25 when the member 25 is turned and serves to normally prevent turning movement of the member 25. The pointer 29 is yieldable to permit the member 25 to be turned by means of the knurled head 28 to bring the desired graduated face 21 into juxtaposition with the pointer. The indicating member 25 is initially positioned on the rod 23 by means of a nut 30 threaded on the member 25 and engageable with the pointer 29. By adjusting the nut 3B and engaging the front edge of the pointer with the nut, any desired graduation of the scale beneath the pointer 29 can be brought into registry with the rear edge of the pointer to indicatethe extent of movement of the carriage i5 necessary to producethe desired length of thread on the pipe or rod being threaded.

As best shown in Fig. 5 of the drawings, the front wall 1 of the spindle housing has a bearing boss 3I and the gear I2 has a hub 32 with a forwardly extending bearing portion 33 that is J'ournaled in a sleeve 34`mounted in the boss 3|, the hub being provided with a shoulder 35 overlying the inner `side of the boss 3l to position the gear kwith respect to the housing wall. The hub 32 has longitudinally spaced interiorly cylindrical portions 3B and 31 in which the tubular spindle II fits, and is provided with a stop shoulder 38 against which the forward end of the spindle bears. The hub 32 is detachablysecured to the spindle II by any suitable means such as a radially disposed screw l39 that engages in an opening 4I! in the spindle I I.

The chuck I3 has a body portion 4I that is detachably and rigidly secured by means of axial attaching bolts 42 to the hub 32 of the gear I2. Radially movable jaws 43 are mounted in the body. 4I and these jaws are simultaneously actuated by means of a scroll Wheel 44. The scroll Wheel 44` is actuated by a hammer action hand wheel 45 that is provided with an internal circumferential slot-46 'overlying the periphery of 4 the scroll wheel 44 and having hammering shoulders 41 at its opposite ends which are engageable with a lug 48 on the scroll wheel which projects into the slot.

The rear wall 8 of the housing has a bearing boss 5I! around its spindle receiving opening which receives a bearing sleeve 5I in which the spindle shoulder 52 against which the rear end of the sleeve 5I fits, and the forward end of the sleeve 5I is engaged by a collar 53 that is clamped to the spindle I I. The collar 53 is transversely split and has a clamping bolt 54 extending across the split to clamp the collar to the spindle. To remove the spindle it is only necessary to loosen the screw 39 attaching the spindle to the gear I2 and to loosen the bolt 54, after which the tu'bular spindle I I can be Withdrawn through the rear wall 8.

By reason of the fact that the driving torque is transmitted directly through the gear I2 to the main chuck I3, the spindle II is notk subjected to driving torque and may be relatively thin walled. The spindle I I, however, eiectively resists lateral stresses tending to move the main chuck about axes transverse to the spindle axis, thereby relieving the stresses that would otherwise be taken by the front wall'of the housing so that the relatively light housing provides a rigid support for the work holding chuck. The present invention effects a substantial lightening of the spindle and the spindle supports, thereby lessening the weight of the machine and reducing the cost of manufacture.

The rear centering chuck I4 is mounted on the rear end of the tubular spindle I I immediately to the rear of the rear wall 8 of the housing, and this chuck has a body portion 55 secured to the spindle II by suitable means such as an attaching screw 56 that engages with an opening 51 in `the spindle. The chuck I4 has radially movable jaws 58 slidably mounted in the body 55, and these jaws are actuated by means of a scroll wheel 59 operated by a hand wheel 60. VThe hand wheel 50 hasa lug 6I that projects into a circumferential slot 62 in they scroll wheel 59, the slot 62 having end shoulders 63 and 64 through which thrust may be transmitted by the hand wheel to the scroll wheel. Since the chuck I4 merely serves to center the work and does not transmit a torsional thrust to the work, it is desirable that the chuck I4 grip the work lightly and be quickly and easily released.

In order torinsure a relatively light gripping engagement with the work, a spring 65 isinterposed between the lug 6I and the shoulder 63 so that the thrust moving the jaws 58 radially inwardly into clamping .engagement with the work is transmitted through the spring. There is, however, a hammer action between the lug 6I and the shoulder 64 of the scroll wheel so that by impact of the lug 5I against the shoulder 64 the clamping jaws lSilmay be instantly released.

The work spindle is driven by an electric motor 66 which is mounted upon'the hinged panel II) and which has a'gearhousing B1 attached to the forward end thereof. A horizontal shaft `68 ec,- centric to the motor 66 projects forwardly from the gear housing 61 and is driven from the motor through reduction gearing 69 in the housing 61. The shaft 68 has a small gear 10 attached thereto which meshes with the gear I2 when the panel IIJ is in its upright position- At its forwardend the shaft 68 has a gear 1I detachably secured thereto by means of a nut 12 rand thisv gear, which 'panelindependently of the pump.'Y

isI considerably larger than the gearl 19, meshes with a gear 'I3' which drives a pump 'I4 also mounted onthe panel I9. The pump 'I4 isy emply'ed to deliver a liquid coolant or cutting lubri-v cant tothe portion of the work being acted upon' bythe threading dies or reamer, the lubricant being pumped from the sumpiand draining back into the sump 5;' The pump 7d is preferably of the' automatic reversing type, pumping liquid in thehsa'me direction regardless of its direction of rotation,v so thatfthe motor may be reversed for cutting right or left hand threads without affect'- ing the operationof the pump.

A exible hose 'I5 connects'A the pump inlet with'a pipe I6 leading tothe sump 5, and a ilexible hose` 'I'I `connects the pump outlet to a pipe I9 which is 'connected by a flexible hose 'I9 `to a lubricant delivery spout 80 mounted on the car'- riage I5.r The spout 8|), as best shownl in Figs. 1 and 2, is in the form of-a rigid -U-shaped tube that'is connected by a universal friction joint 8| to a tting 82 on the carriage I5j which connects the spout to the ilexible tube 79. The spout 8D is frictionally retained inany position of angular adjustment to which-it maybe moved manually. A branch pipe 83 connects the pipe 18 to the sump 5 `and this branch pipe, which forms av lubricant bypass, is provided with a valve 84,'whioh may be opened and 'closed to control the low of lubricant to the spout 80.' Opening The-motor 66 has a base 85 that is detachably securedto the panel I0 by bolts 86. Abracket 81 formed integrally with the panel Iii-is provided with a round opening 88 which receivesthe cylindrical forward end 89 of the gear housing 61. `AY portion of the bracket BVencircling the portion 80 of the housing is split'transversely at 9`II'asgbest shown in Fig. 7, and a clamping bolt 9| extends across the split tov tightly clamp the cylindrical portion 89 ofthe housing.

. The pump 14, which 1s positioned beneath the gear housing 61 when the panel is in its upright position, is detachably securedto the bracket 8i' by' meansA of bolts 92. By releasing the bolts 92 the pump I4 may be detachedV from the panel independently of the motor 6B and by loosening the clamping bolt 9|, removing the attaching `bolts v86, and detaching'the gear II the motor 66 withthe gear housing y6*'I is removablefrom the The exiblehose connections 'I5 and'll are 'detachably connected to the pump sov that the pump can be quickly and easily replaced when desired, all of the attaching devices for the pump and motor being conveniently accessible when A*the panel II) is moved to its open horizontal posiedge.v The pin 93 has axially alined end'portions y ;9'5"`and, 9B that are of smaller diameter than'the bodyo'f the pin, and which are eccentrically dis- 'posed withlr'espect to the body of the pin. The

end portion 95 of the hinge pin isfjournaledin a y 'fb'oss19'I' 4formed vintegrally with the front wall A"I of'the'housing and is provided with` a s'lot 98 adapted to receive a screw driver for imparting a turning movement to the hinge pin. The oppositeend portion 96 of the hinge pin isreceived ina boss 99 integral-with the rear wall 8 of. the housing, the boss 99 havngan openingof greater diameter `than the body of the hinge pin 93and having a bearing sleeve |99 which'may have a press t therein and which provides'a journal for the end,.-portion 96 of the hinge pin. One of the knuckles 94 has a transverse slot I9I opening to the hinge pin receiving opening, and the sloty IOI is bridged by a clampingl bolt |92 which serves to clamp' the hinge pin 93 against turningmovement in the panel I9. By loosening the bolt|.02 the hinge pin may be turned by means ofv ascrew driver engaging iny the slot 98 to adjust the lower portion of the panel inwardly or outwardlyrto provide the desired backlash between thegears I2 and l. When the clamping bolt [92..isreleased, the/hinge pin 93 may be driven. endwise through the opening of the boss 99 of thezrear wall to detach the panel I0 from the spindle housing so that both the pump and the `driving mechanismmay be removed as a unit from ythe housing and replaced with an identical unit,` s o that the operation of the machine need-notfbe interrupted for any substantial period of; time when repairs are necessary. l 'Y w best shown in Fig. 11, a bracketv ID3-.is detachably secured by means of bolts IUIlto .the infner'face of the panelA I9, and this bracket has rigidly attached thereto an eye bolt |05 which, is rigidly clamped tothe bracket .|93 by means of nuts |96 and |97 and which extends vertically downwardly from the bracket when the panel I0 is in upright closed position, as shown in dotted lines in Fig. 11, and which extends horizontally inwardly from the bracket at substantially the level of the'axis of the spindle I I when the panel is in open horizontal position, as showny infull lines in Fig. l1. The eye bolt I 05 is connected to the spindle I I by a toggle which limits the out# ward movement of the bracket ID3 and which serves to support the vpanel in horizontal position when it isswung outwardly. The connecting tog; gle has an cuter link |08 pivoted to thevey'e bolt |05 and an inner toggle composed of sections' |09 and IIIJYconnected by a turnbuckle III. y i ner section III) has an integral ring IIZthatv has a loose t on the spindle II I permitting" rotation of the spindle II II and providing a pivotV for the inner link of the toggle. which swings4 about the axisv of the spindle. By adjusting the bolt |05 and the turnbuckle III the `extent of swinging movement of the panel I9 maybe regulated. l

lThe.motori is controlled by a reversing switch II3` vwhich has an arm II4 projecting through a. slot II5'in. the panel II! which opens to a recessed portion-I I6 in the outer face of the panel. The switch II3 is detachably secured to the housing within a housing I I'I and the housing and switch are detachably secured to the inner face ofthe panel by means ofy bolts I I8 that are screwed into the panel' and that receive lugs or anges |19 and |329 that are integral with the housingand switch. 'The lugs I I9 andIZllare .on the portions ofthe housing and switch that abut the inner face of- 'the panel I9, and are held in place'againstthe panel by means of tubes I 2| that fit over the bolts |'I8 and that are engaged at their outer endsV by a housing cover plate |22. Wing nuts |23 clamp the'cover plate to the Vouter ends of the tubes |21,

the motor 66 is detachably se-cured'by means of clamping nuts |21 to the cover. Suitable connections are made between theconductors of the extension cord and the motor and switch through the conductor conduit |26 and attaching member |24. In order to facilitate detachment of the cover plate |22 from the conduit |26 and connecting member |24 the cover plate |22 is provided with slots |28 which permit detachment of the cover plate from the attaching member and conduit .when the clamping nuts |25 and |21 are loosened. A

During operation of the machine the panel I is rigidly secured in a` iixed upright closed position by means of clamping bolts |29 extending -through the panel into bosses |30 formed integrally with the top wall of the housing.

It will be apparent that the present invention provides a machine tool of economical construction and relatively light weight which can be quickly and easily assembled and in which all parts are readily accessible for replacement or repair, and in which the mechanisms most frequently requiring repair can be quickly and easily removed and replaced with mechanisms in proper running order.

It istg be understood that in accordance with the'pr'ovisions of the patent statutes, variations and-modifications of the specific devices herein shown and described maybe made without departing from the spirit of the invention.

What I claim is:

l. vIn a machine tool, a housing having upright front, rear and side walls, one of said side walls comprising a panel hinged to swing outwardly about a horizontal axis adjacent its bottom edge, vmeans for releasably fastening said hinged panel in upright closed position, means for supporting said hinged panel in horizontal open position, a spindle journaled in said front and rear walls and spaced from said hinged panel, a gear fixed to said spindle within the housing, and a driving unit detachably secured to the inner side of said hinged panel and movable with said panel, said unit comprising a motor, a shaft driven by the motor Yand parallel to said spindle, a gear fixed to said shaft that moves into and out of mesh with the gear on said spindle when said hinged panel is moved to and from its closed position,

'said unit being laterally clear of the housing and a spindle journaled in said front and rear walls and spaced from said hinged panel, a gear fixed to said spindle within the housing, a motor deltachably mounted on the inner face of said 4hinged panel, a gear housingcarried by said motor, a shaft mounted in said gear housing and driven bysaid motor, a gear xed to said shaft and movable with the panel into and out of mesh with the gear on said spindle as. the panel is moved to and from its closed position, and means for adjusting said hinged panel in the closed position thereof toward and away from 'said spindle to regulate the backlash of said gears.

3. In a machine tool, a housing having. up-

8 right front, rear and side Walls, one of said side walls comprising a hinged panel movable lfrom an upright closed position to a horizontal open position, a horizontal hinge pin connecting the lower edge portion of said panel to the housing, said pin having axially alined end portions journaled in said housing and an intermediateportion eccentric to said end portions, means for releasably clamping said eccentric portion to said panel in different positions of angular adjustment with respect to said end portions, driving means including a motor and a gear driven by said motor mounted upon the inner` side of said hinged panel, a spindle journaled in said front and rear walls, a gear iixed to said spindle and positioned to mesh with said motor driven gear when saidv hinged panel is in upright closed position, vand means for releasably securing said hinged panel in closed position.

v4. In a machine tool, a supporting frame, a housing mounted on said frame and comprising front, rear and side walls, one of sai-d side walls comprising a panel hinged t0 swing outwardly from its closed position, a spindle journaled in said front and rear walls and spaced from said hinged panel, a gear fixed to said spindle within the housing, spindle driving means comprising a motor and a gear driven by said motor, both mounted on and movable with said panel, said motor and said driven gear being positioned between said spindle and panel and said driven gear meshing with the spindle gear when said panel is in closed poosition and moving out .of mesh with the spindle gear when said panel is swung outwardly, a collar rotatably mounted on saidspindle, a toggle connecting said collar and said panel to limit swinging movement of the panel, and means for releasably securing said panel inclosed position.

5. In a machine tool, a supporting frame, a housing mounted on said frame and comprising front, rear and side walls, one of said side walls comprising a panel hinged to swing outwardly from its closed position, a spindle journaled in said front and rear Walls, a gear fixed to said spindle within the housing, spindle driving means comprising a motor and a gear driven bysaid motor, both mounted on and movable with said panel, saidv motor driven gear meshing with the spindle gear when said panel is in closed position and moving out of mesh with the spindle gear when said panel is swung outwardly, meansfor limiting the swinging movement of said panel, means for releasably securing the panel in closed position, and means for adjusting said panel with respect to its hinge axis to'regulatethe backlash of said gears. i

- ANTHONY R. CHASAR.

' I REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Polsen et al. June 12, 1951 

